judging from your screenshot you are not exactly at the vip locker ? so i supose you need it to only open when you are near it.
use this:
pawn Code:
//put this under your /viplockercommand IsPlayerInRangeOfPoint(playerid,2.0,x,y,z))//2.0 = distance u can be away form vip locker, and put the coords of where your vip locker is located at x,y,z { //show the vip locker dialog }